- #1
DaveC426913
Gold Member
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One morning Einstein was walking through beautiful rolling meadows and noticed that 3 cows were munching grass. What surprised him was that the cows had their heads through an electric fence mowing the grass that was on the neighbors field. The electric fence was supposed to prevent the cows from eating the neighbor's grass, but apparently they were not being effected by electricity.
Diagram-1
fence
-----------------------------------
Farmer | |cow1 | |cow2 | |cow3 | | Einstein
A ------------------------------------ B
^
|
[Battery +/-]
Soon Einstein spotted a farmer walk by to the fence carrying a battery and he figured that the battery had probably died and so the farmer had taken the battery for charging and was returning with it. He was about to connect it to the fence. This also explained why the cows were able to eat with their heads through the fence un-affected by electricity.
Soon Einstein takes up position on one end of the fence 'B' opposite the farmer. He watches in anticipation as the Farmer connects the battery at 'A'. The 3 cows jump and scream "MOOOOO". Now Einstein remarks to the farmer "wow...they all jumped at the same time". But the farmer remarks "nope, I saw cow1 jump first, then I saw cow2 jump and then I saw cow3 jump". Who is correct and why? Assume both the farmer and Einstein are equidistant from the center of the fence.
Diagram-1
fence
-----------------------------------
Farmer | |cow1 | |cow2 | |cow3 | | Einstein
A ------------------------------------ B
^
|
[Battery +/-]
Soon Einstein spotted a farmer walk by to the fence carrying a battery and he figured that the battery had probably died and so the farmer had taken the battery for charging and was returning with it. He was about to connect it to the fence. This also explained why the cows were able to eat with their heads through the fence un-affected by electricity.
Soon Einstein takes up position on one end of the fence 'B' opposite the farmer. He watches in anticipation as the Farmer connects the battery at 'A'. The 3 cows jump and scream "MOOOOO". Now Einstein remarks to the farmer "wow...they all jumped at the same time". But the farmer remarks "nope, I saw cow1 jump first, then I saw cow2 jump and then I saw cow3 jump". Who is correct and why? Assume both the farmer and Einstein are equidistant from the center of the fence.